Relevant Portion:

With both industry leaders – AT&T and Verizon – on board, AST SpaceMobile is now uniquely positioned to achieve a groundbreaking feat: target 100% geographical coverage throughout the continental U.S., the most valuable wireless market in the world.

The key to unlocking this ubiquitous coverage lies in the power of the premium 850 MHz low-band spectrum, which offers superior signal penetration in the low band cellular range. AT&T and Verizon together will share with AST SpaceMobile a portion of their respective bands of 850 MHz low-band spectrum to enable nationwide satellite coverage.